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Thread: Power Steering Fluid Reservoir Leaking?

  1. #1
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    Mar 2005
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    E34 540i 6sp 1995-03-28

    Power Steering Fluid Reservoir Leaking?

    Replaced a leaking res today.. hoses looked ok , clamps were good to re-use. filled it and drove... checked it and there some fluid had escaped the lid it seems... thing was as tight as it could get and the thing was only filled to the level indicated on the stick... do these always leak a little?

  2. #2
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    Sep 2006
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    hiss by my window
    EVERY old BMW I see has a leaking P/S hose at the reservoir. Are you certain it isn't weeping from a hose on the bottom and being blown around?
    Having said that I also see a lot of caked oil and dirt on the caps too. I'm addressing my own currently and will soon know if the stuff up top is really coming from down under.
    That wasn't much help, was it?

    If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue

  3. #3
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    11/88 E32 750iL+98 E36M3
    On my E32 the lid has a gasket, but the lid is not sealed completely, there is a small breather hole in the lid, so that cold and warm power steering fluid has space to breath. Maybe you filled too much fluid.
    Shogun tricks and tips for the E32 series are HERE!

  4. #4
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    E34 540i 6sp 1995-03-28
    Quote Originally Posted by shogun View Post
    On my E32 the lid has a gasket, but the lid is not sealed completely, there is a small breather hole in the lid, so that cold and warm power steering fluid has space to breath. Maybe you filled too much fluid.
    I'll keep an eye on it. As its a brand new reservoir the O ring is also new .. I never noticed the breather hole before so I'd guess that's where its escaping as it seems to start at the cap and not below..

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